Original Article
  • Time-Temperature-Transition Diagrams with Liquid Crystalline Phase Changes of Liquid Crystalline Epoxy

  • Seung Hyun Cho*†

  • * Department of Materials Science and Engineering, Soong-sil University

  • 열경화성 액정 에폭시 수지의 액정상 변화를 포함한 시간-온도-전이 다이어그램

  • 조승현*†

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Liquid crystalline thermosetting epoxy oligomer DD-A was synthesized with Diglycidyl ether of 4,4'-dihydroxy-α-methylstilbene (DGE-DHMS) and aniline in a ratio of 2:1 and cured with a catalytic curing agent, 1-Methyl Imidazole. The gelation times and vitrification times were measured to create Time-Temperature-Transition Diagrams with liquid crystalline phase changes. It was found that the gelation and vitrification times were decreased as the concentration of curing agent increased, and the vitrification curve showing a typical S-shape was confirmed.


Diglycidyl ether of 4,4’-dihydroxy-α-methylstilbene (DGE-DHMS)에 aniline을 2:1의 비율로 첨가한 액정에폭시올리고머인 DD-A를 합성하고 촉매성 경화제인 1-Methyl Imidazole을 이용하여 경화시키며 겔화 및 유리화 시간을 측정하여 액정 변화가 포함된 Time-Temperature-Transition Diagram을 작성하였다. 경화제의 농도가 높아질수록 겔화 및 유리화 시간이 감소함을 확인할 수 있었고 유리화 곡선은 전형적인 S-형태를 보였다


Keywords: 열경화성액정에폭시(Liquid crystalline thermosetting epoxy), 겔화시간(Gelation time), 유리화시간(Vitrification time), 시간-온도-전이 다이어그램(Time-Temperature-Transition Diagram)

This Article

Correspondence to

  • Seung Hyun Cho

  • Department of Materials Science and Engineering, Soong-sil University

  • E-mail: scho@ssu.ac.kr